Method and apparatus for lining crown caps



Aug. 29, 1939. P. E. PEARSON METHOD AND APPARATUS FOR LINING CROWN CAPS Filed July 1 2, 1957 7 Sheets-Sheet 1 l 1 ,(2O. Z.

E. PEARSON Aug. 29, 1939.

Filed Jul 12, 1937 7 Sheets-Sheet 2 Aug. 29, 1939. P E. PEARSON 1, 8

, METHOD AND APPARATUS FOR LININ'G CROWN CAPS Filed July 12, 1937 7 Sheets-Sheet 3 Aug. 29, 1939. P. E. PEARSON 2,171,258

METHOD AND APPARATUS FOR LINING CROW N CAPS Filed July 12, 1937 7 Sheets-Sheet 4 Aug. 29, 1939. P. E. PEARSON 2,171,258

n METHOD AND APPARATUS FOR LINING CROWN CAPS Filed July 12, 1957 7 Sheets-Sheet 5 AIME W WU

Aug. 29, 1939. P. E. PEARSON 2,171,258

IETHOD AND APPARATUS FOR LINING CROWN CAPS Filed July 12, 19s? 7 Sheets-Sheet 6 i I; vwc/wkw L91 3 7 r31 29 g Aug. 29, 1939. P E. PEARSON 8 IETHOD AND APPARATUS FOR LINING CROWN CAPS I Filed July 12, 1937 7 ,Shets-Sheet 'r Patented Aug. 29, 1939.

UNITED STATES METHOD AND APPARATUS FOR LINING CROWN CAPS Paul E. Pearson, Chicago, Ill., assignor to Continental Can Company, Inc., New York, N. Y., a corporation. of New York Application Jul 12, 1937, Serial No. 153.24.:

disks to the pads in such caps.

Closure caps designed for. use on containers for beer or similar beverages usually have'the "sealing pads thereof faced with an" impervious l5 paper-so as to prevent direct contact between the beverage and the padandalso to prevent leakage of gases. It has been found advantageous toemploy facing disksoi the center gspot" type, 20, that is to say disks of a diameter less'than'that ofthe pad so as to protect the bei ierage'from padcontact and yet permit contact between the containerneck and an annulus of padsurface so as to provide the most effective seal possible.

larly disks of the center spot" type, has presented numerous problems; Probably the 'most effective manner of affixing the disks has been by use of a heat fusible adhesive, that is to say an adhesive normally non-tacky but rendered tacky by application of heat. Even the man er of applying the necessary heat has presente prob v lems difiicult of solution. l

Some workers in the art'have applied heat to the metallic caps but this has been found to. be injurious to the decorated and printed surfaces of the caps. Others have sought to heat the pads-within the caps and have been confronted with the problem of scorching the pads and im- 40 pairing their sealing qualities or burning and entirely ruining them. Even when" partially successful such eiforts have been only indirectly efiective for the intended purpose of heating the fusible cement carried by the disk material and it! have served to complicate and unduly encumber the apparatus necessary to be used. Such methods and apparatus, however, had one redeeming feature in that they madepossible the use of cold punches for cutting out or'forming so the liner disks, and'such punches presented no troublesome problems with respect to expansion and contraction of metals.

Other workers in the art. seeking to avoid the disadvantages of preheating the caps, have 65- sought use hot plungers and have experienced;

.liner diskof aluminum or other foil or treated The ailixing of lining disks tocap pads, parti'cuproblems of metal expansion and contraction, and some have used cold plungers for cutting. the liner disks in conjunction with subsequently operative, complicated, heated setting plunger equipments. 5 his to the elimination of the problems angL disadvantages above enumerated that I have addressed my efforts.

Among the objects of the invention is/t'o provide a novel method of applying cap liner disks 10 which comprises the steps of forming and directly attaching a iusible adhesive coated liner disk to a holding-device, heating the disk while held by the holding device, applying the disk to applying pressure to cause the disk to permanently adhere to said pad.

Another object of the invention is to provide a method including the step of applying the spot" to the pad by a movement in a direction opposite the direction of movement which efiects the punching out of the spot.

Another object of the invention is to provide a novel method of applying cap liner disks which includes the step of directly heating the liner disk to fuse or render tacky its adhesive coating. Another object of the invention is to provide a novel method of assembling a spotted" crown cap which comprises the steps of punching a spot from a strip of fusible adhesive coated spotting material by use of a cold punch, pneumatically and directly attaching the spot to a holding .plunger, heating the adhesive coated surface of the "spot while it is supported on the plunger, bringing about a centered relation between a pad equipped cap and said spot, and utilizing said plunger to apply and secure the. "spot centrally on said pad.

Another object of the invention is to provide novel apparatus for carrying out the novel method stepsabove enumerated in a manner assuring constant control of the formed disks and eliminating all possibility of disruption of the centered relation of "said disks.

Another object of the invention is to provide a novel "spotted crown cap assembling machine in which is provided padded cap feeding means, a step-by-step rotatable table or rotor having multiple faces each equipped with a plurality of cap receiving pockets, means to present A a sealing pad by use of the holding device, and 16 which said "spots" are affixed to carrying plungers, .at succeeding stations of which said a novel means for punch forming the spots including devices for so positioning the spotting material that it .is punched through from its adhesive coated side.

Another object of theinvention is to provide a novel means for controlling the functions of the cap feeding means, the punching means, the spot material feeding means, the spot aflixing and applying means, the heating means, and the cap delivering means.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more fully understood by following the description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a plan-view of a machine embodying the invention, parts being broken away and in section;

Figure 2 is a side elevation of the machine, parts being broken away and in section;

Figure 3 is a rear end elevation of the machine;

Figure 4 is a horizontal section taken on the line 4-4 on Figure 2;

Figure 5 is an enlarged vertical cross section of the table taken on the line 5-5 on Figure 1;

Figure 6 is an enlarged detail plan and part horizontal sectional view of a segment of the intermittently movable table and the punch and die equipments in operative position;

Figure 7 is a fragmentary, somewhat diagrammatic plan and part horizontal sectional view illustrating the retracted condition of the punch and die equipments;

Figure 8 is a detail vertical cross on the line 88 on Figure '7;

Figure 9 is a diagrammatic plan view illustrating the paths of movement followed by the carrier or holder and cap discharging slide roller axes respectively;

Figure 10 is a detail vertical section taken at station one and showing the method steps of section taken punch-forming the liner disks and amxing them apply the liner disk to the .cap pad and hold it.

firmly thereagainst;

Figure 14 is a detail vertical section taken at station eight and showing the method step of discharging the assembled caps;-

Figure 15 is a 'detail vertical section illustrat ing the stripping of the spots from the punches;

' Figure 16 is a diagrammatic plan illustrating the paths of movement followed by the carrier or holder and cap discharging slide roller axes respectively in practicing the method modification shown in Figure 17;

v a battery Figure 17 is a view similar to Figure 10 and .showing a modified method step in which the formingpr cutting-of the liner disks is accomplishedby the carriersor holders; and

' Figures 18 and 19 are plan and vertical cross sectional views illustrating a "spotted crown cap. z I v In the drawings in which like numerals of reference indicate like parts in all of the figures, the apparatus selected as an example embodiment of the principles of the invention includes a frame having a base standard 5 and a rotor she'll. portion 6 supported thereon.

Abearing shaft or column I is rigidly secured to the frame and projects vertically therefrom, as shown in Figure 2. The column 1 includes a bearing portion 8 about which the hub 9 of a rotor or turret ill is freely rotatable. The rotor includes an octagonal peripheral flange ii providing eight station faces or sectors and is adapted to be indexed about the center column to present its faces serially in a manner, and for a purpose, soon to be described.

To provide for proper indexing of the rotor, said rotor is equipped with a plurality of rollers i2, one depending centrally beneath each rotor sector as shown in Figures 2 and 4. These rollers are engaged and moved step-by-step by the flanges i3 of the groove cam I carried by the shaft l5 having horizontal transverse bearing as at iii in the frame portion 5. Such rotor indexing cams are well known and serve at each revolution to advance or index the table one station and then hold it stationary during a definite dwell period. A worm wheel I! is secured to the shaft i5 and is driven by a worm l8 carried on a drive shaft I! to which power is applied through pulleys 20, orother suitable power transmitting 23 whenever desired.

At each sector the rotor 'isequipped with a T- .shaped slideway 24 and a ceillngpiece 25 covering only the outer portion of said slideway. A face plate 26 is removably secured, as at 21, to the peripheral face of the rotor flange Ii at each sector, and is equipped with a battery (five in this illustration) of vertically disposed cap receiving grooveways 28. Each plate 26 and its associated rotor flange portion is equipped with a battery of horizontal bores 2!,each said bore passing centrally through one of the grooveways 28.

Extendingacross beneath each battery of grooveways, is a rotor bottom opening 30 through which caps may be discharged from the grooveways 28. Each;such opening is normally closed,

by the T-head portion of a slide 3i. The sides of the grooveways 28 and the top surface of each slide 3| are so spaced with relation'to therespective bores 29 that the crown caps, when received in the grooveways as shown in Figure 12, are centered across said bores." Y

A second T-head slide 32 is slidable over the T-head slide 3i at eachrotor sector and carrier slide 3i, and a track groove '38 for receiving a roller 39 projecting upwardly from each carrier thrust arm or pitman ll with a strap member 6| 1 with .at any given time, projects longitudinally to project through the opposite ,ends of the bores or holder element slide 32. It will be readily understood that as the rotor is moved step-bystep about the column I, the rollers 31 and 39 will be moved along in the cam grooveways 36 and 38. and the grooveways will determine the positions of the slides. The path of movement followed by the respective rollers 31, 38 is illustrated by the dot and dash lines in Figure 9.

Each holder or carrier 33 is provided with an axially disposed suction duct ll. All of the ducts of each battery of plungers communicate with a manifold duct in the slide head which carries them, and each manifold duct communicates,

through a pipe line ll including a flexible section 42, with a valve member 43 rotatable about a tapered hub 44 secured at 45 upon the column I. The valve member 43 is held against endwise movement by a keeper head 48 secured on the hub M. The valve member 43 is caused to move with the table III by radial arms "secured at 'their inner ends to said member, and at their outer ends, bypin and 'slot connections 48, to

the ceiling pieces 25 of the table; An annular suction duct 49 is provided in the valve member and is connected with the several pipe lines ll as at 52, to

each stop station succeeding this station will be individually identified, as stations (#2), (#3), etc., up to and including station (#8) which is the cap discharging station. The functions taking place at the several stations will be described in detail hereinafter.- I

The bracket II carries a pair of. slide guide members 53, removably secured thereon as at it,

and grooved to receive and guide a slide member 55. A shaft 56 is rockably. supported on the bracket and a crank member 51 is secured on the shaft and link-connected as at 58 with the slide member- 55. Another crank member 59 is secured on. the shaft It and connected by Ta encircling an eccentric 62 carried by the shaft l5 hereinbef ore, referred to. The rotary motion of the shaft liis transmitted to the'slide member 55, in the form of reciprocating motion, by the connections, 82, Cl, 60, SI, 58, 51 and 56.

A battery of punches 63, corresponding in.

number and axially aligned with the bores 20 in the rotor face presented in opposition therei from the slide member I5, being removably and adiustably secured thereon as at 6|. The slide member 55 includes a pair of guide bores equipped with slide rods 8. The rods are free and are frictionally held in said bores by friction pins 61. See Figures 6, 7, a d 8. At the ends thereof presented toward the riphery of the rotor, the rods 6 carry a die m mber 6|, re-

' movably secured thereon as at it. A die plate II is removably'secured, as at '|l,.in a face recess formed in the die member. The face recess is punches in the formation of spot disks. Adjust- After leaving the rolls I! the foil strips 18 pass a over guide rolls 'I'l mounted on and movable with the die member Bl, thence through the grooveways 12, thence between feed rolls. ll one of which has a ratchet'wheel I. attached thereto. An oscillatable ratchet arm ll, link driven as at 8| from a crank disk 82 carried by the shaft I}, imparts step-by-step feed movement to the feed rolls. The waste strips fed through the rolls II pass over suitable guide rolls to take up spools it which rest upon and are driven frictionally by rolls 84 to which rotation 'is imparted, as at .5, from the shaft l5. I v Y A crown cspsupply home: It of any approved type is mounted, as at 81, upon the machine frame and delivers the sealing pad equipped crown caps, through suitable feeder grooveways, into five vertical delivery chutes ll positioned as shown in Figures 2 and 3 so that their delivery ends 89 align with the cap receiving grooveways 2| of whichever rotor face happens to be pre-' seated at station (#1) at the delivery interval.

It will be observed by reference to Figure 9 that the groove 38 of the stationary cam 84 has a portion effective; as therotor approaches station (#1), tocause the particular roller to move outwardly as indicated at ll, moving the plungers I3 to the position shown'in Figure 10, and a portion effective, as the rotor leaves station (#1), to

cause said .roller to again move outwardly as indicated at-sl moving the plungers to the position shown in Figure 11. While-a given rotor sector is located at station (#1), a supply of crown caps are fed to its receiving grooveways 28. and a proper number of liner disks or spots 02, are formed by the punches u and transferred by them directly to the holders or carriers 33 whereon they become pneumaticallyamxed.

,. In the formation and pneumatic amxing of the spots, at station (#1), the suction plungers are positioned as shown in-Figure 10, traversing the cap grocveways "and supporting the caps on the upper surfaces thereof. As the rotor sector first moves to this position, the die and punch equipments are positioned somewhat as shown in Figure 'l, inactive and spaced from the rotor periphery. During this rest position of the rotor, however, the punch forming equipments actively function. The slide 56. the rods l. and the diemember 68 move as one until the die member engages the rotor face. Thediemember then remains stationary while the slide I moves along the rods 6 and the punches 63 pass through the .bores 13, forming spots I! and transferring them to the pneumatic holders or carriers 83 as above stated.

. It will be observed, by reference to Figures 6, "I, and 15. that as the punch and die equipments are withdrawn they move in unison until the rods strike the abutments II, when movement of the rods 6 will be stopped so that continued move- 'ment oi the slide I! will restore the parts to the caps.

ances necessary to permit indexing of the rotor. The punches 83 preferably are equipped with axially disposed spring pressed stripper pins 93 which .are effective, upon withdrawal of the punches, to strip the spots 93 from the punches should they tend to adhere. 'It will be noted that these pins are larger in diameter than the suction ducts 40 so as to definitely assure against breakage of suction should edge portions of the spot tend to cling to the punch.

A heating element carrier Ell, equipped with a resistance heating element 95 to which electrical energy may be applied as at 96, is supported on a spider 91 attached to a center shaft 98 vertically reciprocable in-a bore 99 formed in the center column I. the rotor, at stations (#2), (#3), (#4), and (#5), being spaced from the peripheral flange thereof as shown in Figures 1, 2, and 11. At its lower end the center shaft 98 is supported on toggle links I connected at IOI to a downward extension I02 of the clutch lever 22. Whenever the lever is shifted to throw out the clutch and discontinue movement of the table, the toggle is straightened as shown in Figure 2 and the heating element is lifted to an ineffective position. See Figure 2. By this means it is impossible to subject the pneumatically held liner disks or spots to an abnormal heating interval.

As has been previously stated. as a given rotor sector moves away from station (#1) its spot bearing suction plungers 33 are projected to the position shown in Figure 11. In this position the spots 92 are held presented toward the heating element 95 and have heat applied directly to the.

exposed heat fusible adhesive coated surfaces thereof. The groove38 of the cam 34 includes a dwell portion, as will be observed by reference to Figure 9, which is effective to hold the carriers 33 in the projected position throughout all of stations (#2), (#3), (#4), and #5) and the travel intervals intervening said stations. The carriers and the pneumatically held spotsthus pass through a heating zone of considerable length. When a given rotor sector is passing from station (#5) to (#6), a portion of the cam groove 33 becomes effective to first withdraw the plungers. 33, as indicated at I03 in Figure 9. removing the support from beneath the caps in the grooveways '28 and permitting them to fall, as shown in' Figure 12, into position centered with respect to the plungers, and then again projectthe carriers or holders, as indicated at I04 in Figure 9, to press the heated spots against the cap pads as shown in Figure 13. A second dwell portion in the cam groove 30 serves to hold the plungers in the position shown in Figure 12 at station #6) while passing to station (#7) and for an interval after they leave station (#7), permanently setting the spots and completing the assembly of the See I05 in Figure 9.

As. a given rotor sector is moving into station (#8),-a portion of the cam groove 36 becomes effective as indicated at I06, to withdraw the discharge slide 3| and open the discharge passage 30 through the bottom of the rotor sector. same time a portion of. the cam groove. becomes effective, as indicated at III], to withdraw the plungers 33 a distance suflicient t'o free the caps and permit them to fall through the discharge ppening, 'as shown in Figure 14. After the discharge of the assembled caps has .been effected at station (.#8) (and as the rotor sector leaves that station to return again to station (#lhflthe cam groove 36 becomes effective as in- The carrier surrounds a portion of .reference to Figures 11 through 15 and 17.

At the. I

dicated at I06 in Figure 9, and the cam groove 38 becomes effective as previously stated and as indicated at 90 in the same figure, to restore the slide 3f and the elements 33 to the initial positions shown in Figure 11.

The crank member 59 carries an upward extension I08 engageable with one end of a rod I09 slidably supported at IIO on the bracket 5| and connected at its other end with a crank III mounted on a rock shaft II2 which carries a battery of cap holding and releasing fingers H3.

The fingers II3 are oscillatable into and out of engagement with the lowermost caps in the feed chutes 08 and the parts are so constructed and arranged that each time a rotor sector moves into position at station (#1) the fingers will be moved away to release the lowermost caps in the chutes 88 and permit them to fall into the rotor flange grooveways on top of theplungers 33 traversing said grooveways. Sec Figures 2 and 11.

In Figure 17 I have shown a modified form of the invention in which the elements 33= serve the triple function of punch-forming, carrying and applying the spots. In this figure. parts corresponding in construction and function with like parts hereinbefore described are given the same ref ercnce numeral with the modification exponent a.

In order to adapt the apparatus to this modified use, the cam groove 38 is provided with a portion effective, as indicated at H4 in Figure 16, during movement of a given rotor sector to station (#1) to project the plungers 33" an additional distance to the position shown in Figure 1.7.

With the plungers 33 thus positioned, as the slide 55 moves the die member 68' and plate I0 against the rotor face the elements 33 vwill act as punches as shown in Figure 1'7, suitably cut- ,ting spots 92 from the foil strip 16. Instead of carrying punches, the slide 55 carries a battery 'of spring pressed stripper plungers H5. In this form the cam groove .38 may or may not be equipped with a portion effective during movement of the rotor sectors away from station (#1) to retract the-elements 33= slightly, as indicated at H6 in Figure 16, so that they will not project too closely to the heating element. Aside from these changes the parts function as hercinbefore' described.

The method steps will be well understood by The liner disks or spots are punch-formed and directly applied to the carrier or pneumatic holders or carriers. By directly affixing the spots as hereinbefore described the spots always are under perfect control and the centered relation of spot, plunger and cap pad can never be disturbed or disrupted. The pneumatic holders or carriers carry the spots through a heated zone where heat is applied directly to the exposed heat-fusible adhesive coated surfaces thereof, and then the holders or carriers are pressed against the cap pads for an interval of time suitable for permanently setting the applied spots.

The apparatus herein disclosed embodies many novel and advantageous features particularly pointed out in the appended claims, and many of these features may be structurally varied without departing from the scope of the appended claims. It is to be understood also that the apparatus herein disclosed is but an example of apparatus adapted to the practicing of the method steps herein described and claimed as novel. and that other forms of apparatus may be embetween the disk and a pad for applying the disk to the pad.

2. The method of assembling cap pads and protective disks which comprises, pneumatically attaching a fusible adhesive coated disk to a supporting element, heating the disk on said element, bringingabout relative movement between the element and. a pad for applying the disk to the pad, and thereafter utilizing said element in applying pressure to said disk for permanently uniting it with said pad.

3. The method of assembling cap pads and protective disks which comprises, cold-punching a disk from fusible adhesive coated material by punching through from the coated side of said material, applying heat directly to the coated side of the disk to fuse the adhesive thereon, and aflixing the adhesive bearing surfaceof the disk to a pad. l

4. The method. of assembling cap'pads and protective disks which comprises, cold-punching 'a disk from fusible adhesive coated material, moving the disk to and pneumatically attaching it with a carrying element, moving said element through a heated zone to fuse the-adhesive coating on the disk, and afllxingsaid disk to a pad by pressure applied in part by 'said element.

. 5. The method of assembling sealing pad equipped caps and center spots. which comprises, cold-punching a spot from fusible adhesive coated material, transferring the spot directly to and aflixing it to a pneumatic carrier element, applying'heat directly to the adhesive bearing surface of the spot while on said element, positioning a cap and the element with the element in. centered relation to said cap, and pressing the element and cap pad to adhesively unite the spot and pad. r I

6. In a pad and protective disk assembling machine, a disk carrier, means for attaching a fusible adhesive coated disk to said carrier, means for directly heating the disk while on said carrier,

means for presenting a pad and said supported disk in centered relation, and means for pressing together the carried disk and a pad to causesthe disk to be; adhsively united to the-pad.

p 7. -In a pad and spot assembling machine, means for punch-forming a spot, pad positioning 1 means, and means for aiiixing the punch engaged face of the spot to a pad.- I

8, In a pad and spot assembling-machine,

means fo'npunch-forming a spot from adhesively coated material with the punch passing through from the adhesive coated side of said material, and means for adhesively uniting the spot and a pad by 'afllxing the adhesively coated face of the spot to said pad;

9. In a pad and protective disk assembling machine, a carrier, punch and die means for punch-- forming a disk from heat fusible adhesive coated material and pressing it against said carrier, means for pneumatically attaching the disk t6 said carrier, pad positioning means, means for heating said disk while on said carrier, and means for pressing'the carrierand pad together to adhesively unite the disk and pad.

10. in a pad and protective disk assembling machine, a pneumatic carrier, means for punching a disk from disk material and presenting it a for attachment to said carrier, means for posiing a disk from fusible adhesive coated material and presenting it for attachment to said carrier, means for heating the disk while on said carrier, means for positioning a pad, and means for pressing the carrier and pad together to adhesively unite said pad and disk.

12. In a pad and protective disk assembling machine, a pneumatic carrier, means for punching a disk from fusible adhesive coated material and presenting it for attachment to said carrier, means for moving the carrier through a heated zone to fuse the adhesive on the disk carried thereon by application of heat directly to said adhesive, means for positioning a pad, and means for pressing the carrier and pad together to .ad-' hesively unite said pad and disk.

13. In a pad and spot assembling machine, a rotor having a pad feeding and positioning guideway therein and a plunger bore centrally traversing said guideway, a movable slide normally closing the guideway and disposed to center a pad on the axis of the bore, and a spot-applying suction plunger reciprocable in the bore.

14. In a pad and spot assembling machine, a rotor having a pad feeding and positioning guideway therein and a plunger bore centrally traversing said guideway, a movable slide normally clos-.

ing the guideway and disposed to center a pad on the axis of the bore, a suction plunger reciprocable in said bore, means for applying a spot to said plunger for pneumatic, attachment there to, and means for withdrawing the plunger into the bore-topermit a pad'to feed into centered relation against the slide and for then pressing the plunger against the pad for uniting the spot therewith.

matic attachment thereto, means for heating the spot while on said plunger, and means for withdrawing the plunger into the bore to permit a pad to feedinto; centered relation against the slide and for then pressing the plunger against the pad for uniting the spot therewith.

16. m a pad and spot assembling machine, a

rotor'having a pad feedingand positioning uideway therein and a plunger b'ore centrally travers-' ing said guideway, a movable slide normally closing the guideway a'nd to center a pad on the axis of the bore, a suction plunger reciprocable in said bore, vmeans 'f or applying afusible adhesive coated spot to said plunger forpneumatic attachment thereto, heating means, and

means for first projecting the plunger from the I bore to present the spotto the heating means for direct application of heat thereto, for thenwithdrawing the plunger into thelbore. topermit a pad to feed into centered relation against the slide, and for then pressing the plunger against the pad for unitingthe spottherewith.

17. In a pad and spot assembling machine, a

rotor having a pad feeding and positioning guideway, a movable slide normally closing the guideway and disposed to center a pad on the axis of the bore, a suction plunger reciprocable in said bore, means for applying a fusible adhesive coated spot to said plunger for pneumatic attachment thereto, heating means, and means for first projecting the plunger from the bore to present the spot to the heating means for direct application of heat thereto, for then withdrawing the plunger into the bore to permit a pad to feed into centered relation against the slide, for then pressing the plunger against the pad for uniting the spot therewith, and for thereafter again withdrawing the plunger and the slide to permit the spotted pad to feed out of theguideway.

18. In a pad and spot assembling machine, a

rotor having a pad feeding and positioning guideway therein and a plunger bore centrally traversing said guideway, a movable slide normally closing the guideway and disposed to center a pad on the axis of the bore, a suction plunger reciprocable in. said bore, means for feeding a strip of fusible adhesive coated spot material, means for punching a spot from the strip and applying it to said plunger for pneumatic attachment thereto, heating means, and means for first projecting the plunger from the bore to present the spot to the heating means for direct application of heat thereto, for then withdrawing the plunger into the bore to permit a pad to 'feed into centered relation against the slide, and for then pressing the plunger against the pad for uniting the spot therewith.

19. In a pad and protective disk assembling machine, a suction plunger, means including a .punch element reciprocable in axial alignment with said plunger for punching a disk from disk material and presenting it for attachment to said plunger, means for positioning a pad, and means for pressing the plunger and pad together to cause the disk to be united thereto.

20. Ina pad and protective disk assembling machine, a suction plunger, means including a punch element reciprocable in axial alignment with said plunger for punching a disk from fusible adhesive coated material and presenting it for attachment to said plunger, means for heating the disk while on said plunger, means for positioning a pad, and means for pressing the plunger and pad together to adhesively unite said pad and disk.

21. In a pad and spot assembling machine, a rotor having a pad feeding and positioning guideway therein and a plunger bore centrally traversing said guideway, a movable slide normally closing the guideway and disposed to center a pad on the axis of the bore, a suction plunger recip rocable in'said bore, means including a punch element reciprocable in axial alignment with said plunger for punching a spot from fusible adhesive coated spot material and applying it to said plunger for pneumatic attachment thereto, means for heating the spot while on said plunger, and means for withdrawing the plunger into the bore to permit a pad to feed into centered relation against the slide and for then pressing the plunger against the pad for unitingthe spot therewith.

22. A pad and spotd'rssembling machine comprising a rotor having a plurality of faces each equipped with a set of pad feeding guideways therein and a set of plunger bores each centrally traversing one of the guideways, slide means nor- .mally closing the guideways of each set and disposed to center pads on the axes of the bores of the respective set, a set of suction plungers reciprocable in each set of bores, means for moving the rotor step-by-step to serially present the faces thereof, means for serially applying to the sets of plungers thus serially presented sets of fusible adhesive coated spots for pneumatic attachment to said plungers, heating means disposed'adjacent the periphery of the rotor, means for projecting the sets of plungers beyond the rotor periphery during a portion of the rotor travel to present theattached spots to the heating means, means for at a place subsequently reached withdrawing the plunger sets serially into their bores to permit the sets of pads to feed into centered relation against the slides and for then pressing the plunger sets againstthe pads and holding them there during a travel interval of the rotor to adhesively unite said pads and spots, and means for thereafter serially moving the slides to discharge the assembled pads.

23. A pad and spot assembling machine comprising a rotor having a plurality of faces each equipped with a set of pad feeding guideways therein and a set of plunger bores each centrally traversing one of the guideways, slide means norplungers beyond. the rotor periphery during aportion of the rotor travel to present the attached spots to the heating means for at a place subsequentlyreached withdrawing the plunger sets serially into their bores to permit the sets of pads to feed into centered relation against the slides and for then pressing the plunger sets against the pads and holding them there during a travel interval of the rotor to adhesively unite said pads and spots, and for thereafter serially moving the slides to discharge the assembled pads.

24. In a machine of the character described, a rotor, pad supporting and spot applying means including spot carrying plungers, heating means disposed adjacent the periphery of the rotor, and means for moving the rotor step-by-step to present the plungers and spots carried thereon to the heating means.

25. In a machine of the character described. a step-by-step rotatable rotor, pad supporting and spot applying means including spot carrying plungers, heating means disposed adjacent the periphery of the rotor, means for projecting the plungers at the periphery of the rotor to present the spots to the heating means, and means for rendering the heating means ineffective whenever the step-by-step movement of the rotor is discontinued.

26. In a machine of the character described, a step-by-step rotatable rotor, pad supporting and spot applying means including spot carrying plungers, heating means disposed adjacent the periphery bf'the rotor, means for projecting the plungers at the periphery of the rotor to present the spots to the heating means, and means for moving the heating means away from the plunger carried spots whenever the step-by-step move-- posed to center pads on the. axes of the bores of the respective set, a set of suction plungers reclprocable in each set of bores, means for moving the rotor step-by-step to serially present the faces'thereof, a loading station and means thereat vfor feeding pads to said sets of guideways. means for supporting fusible adhesive coated spot material'at said station, means atsaid station including a set of punches for punching spots from said material and applying them for pneumatic attachment to the sets of plungers as they are serially presented, heating means disposed adjacent the periphery of the rotor, mean'sfor projecting the sets of plungers beyond the rotor periphery during a portion of the rotor travel to present the attached spots to the heating means, means for at a place subsequently reached withdrawing the plunger sets-serially into their bores to permit the sets of pads to feed into centered relation against the slides and for then pressing the plunger sets against the pads and holding them there during a travel interval of the rotor to adhesively unite said pads and spots, and means for thereafter serially moving the slides to discharge the assembled pads.

28. In a pad and spot assembling machine a spot forming carrying and applying plunger 'having provision for pneumatically holding a spot thereon, spot material supporting means, a die, means for causing the .die and the plunger to interengage with the spot material therebetween to form aspot, and means for withdrawing the plunger with the spot thereon and applying it to apad.

29. In a pad and spot assembling machine a spot forming carrying and applying plunger having provision for pneumatically holding a spot thereon, spot material supporting means, a die, means for causing the die and the plunger to interenga'ge with the spot material therebetween to form a spot, means for withdrawing the plunger with the spot thereon andapplying it to a pad, and a yieldable stripper plunger opposing the suction plunger during the formation of the spotand operable to strip the spot from the die.

30. In a pad and spot assembling machine, a support having-a pad feeding guideway therein and a plunger bore centrally traversing said guideway, a movable slidenormally closing the guideway and disposed to center a pad on the axis of the-bore, a die plate havinga spot defining opening 1therein disposed adjacent and in axial alignment with the bore, means for sup-' porting spot forming material across said opening, a suction plunger in said bore, and means for-causing the plunger and the die opening to interengage to punch form a spot, means for withdrawing the plunger with the spot pneumatically aflixed thereto across the guideway to permit a pad to be fed onto the slide, and means 7 guideway and. dlsposedto center a pad on the axis of the bore, a die plate having a spot defining opening therein disposed adjacent and in axial alignment with the bore, means for supporting heat fusible spot forming material'across said opening, a suction plunger in said bore, and

means for causing the plunger and the die'opening to interengage to punch form a spot, heating means, means for presenting the suction plunger and the spot thereon to said heating means, means for withdrawing the plunger with the spot pneumatically afiixed thereto across the guideway to' permit a pad to be fed into the slide, and means for projecting the plunger to apply the spot to a pad supported on said slide.

'32. In a padand spot assembling machine, a support, having a pad feeding guideway therein and a plunger bore centrally traversing said guideway, a movable slide normally closing the guideway and disposed to center a pad on the axis of the bore, a die plate having a spot defining opening therein disposed adjacent and in axial alignment with the bore, means for supporting heat-fusible spot forming material across said opening, a suction plunger in saidbore, and means 'for causing the plunger and the die opening to interengage to punch-form a spot, a yieldable stripper plunger opposing the suction plunger. during the formation of the spot and operable to strip the spot from the die, means for withdrawing the plunger with the spot pneumatically aflixed thereto across the guideway to permit a pad to be fed into the slide, and means for projecting the plunger to apply the spot to a pad supported on said slide. 1

33. In a pad and spot assembling machine, spot forming and applying means includinga suction plunger for punching thespot, translatmg the spot to a place of assembly and there means, and means operable upon disengagement of said clutch for rendering said heating means inefiective.

35. In closure can spot forming and assembling apparatus, the combination of a die, a punch movable through' the die, a carrier plunger disposed in opposed relation to the punch and adapted to directly receive a spot formed by the punch, and

means for moving the plunger to engage the spot with a cap pad. v

36. In closure cap spot forming and assembling apparatus, the combination of a die, a punch movable through the die, a carrier plunger disposed in opposed relation to the punch and adapted to directly receive a spot formed by the punch, astr ipper plunger carried by the punch and efiective upon withdrawal of the punch to strip the formed spot therefrom. and press'it against said plunger, and means formoving the carrier plunger'to apply the spot to a cap pad.

3'7. In closure cap spot forming and assembling apparatus, the combination of a die, a

punch movable through the die, a carrier plunger disposed in opposed relation to the punch and having a suction duct axially disposed therein and extending through the end thereof opposed to the punch so' as to adapt it to receive and pneumatically hold a spot formed by the punch, and means for movingthe plunger to engage the spot with a cap pad.

38. In closure cap spot forming and assembling apparatus, the combination of a die, a punch movable through the die, a carrier plunger disposed in opposed relation to the punch and having a suction duct axially disposed therein and extending through the end thereof opposed to the punch so as to adapt it to receive and pneumatically hold a spot formed by the punch, a stripper plunger disposed in a recess in and extending centrally endwise from said punch and effective upon withdrawal of the punch to strip the formed spot therefrom and press it against said plunger, and means for moving the carrier plunger to apply the spot to a cap pad.

39. In closure cap spot forming and assembling apparatus, the combination of a die, a punch movable through the'die, a carrier plunger disposed in opposed relation to the punch and having a suction duct axially disposed therein and extending through the end thereof opposed to the punch so as to adapt it to receive and pneumatically hold a spot formed by the punch, a stripper plunger disposed in a recess in and extending centrally endwise from said punch and eifective upon withdrawal of the punch to strip the formed spot therefrom and pressit against said plunger, said stripper plunger being of a diameter in excess of the cross sectional area of said suction duct whereby to prevent a breaking of the suction during the stripping of the spot from the punch, and means for moving the carrier plunger to apply the spot to a cap pad.

40. In closure cap spot forming and assembling apparatus, the combination of a support having a battery of spot receiving openings therein, a slide reciprocable toward and from said support and carrying a battery of punches aligned with said openings, and a die member carried by the slide and having bores therein for receiving and cooperating with the punches in the punch forming of spots, said'die member and said punches being mounted. for relative movement during reciprocation of the slide whereby in one direction of reciprocatory movement the die member will strike the support and the punches then move through said bores into said openings, and in the opposite direction of reciprocatory movement the punches will move out 'of said openings and clear said bores.

41. In closure cap spot forming and assembling apparatus, the combination of a reciprocable slide having longitudinal guide'bores therein, a battery of punches projecting longitudinally from said slide, rods slidable in and projecting through the respective ends of said guide bores, a die member carried by said rods and having punch receiving openings therein, means for irictionally engaging the rods in the guide bores, and abutment means engageable by the rods and the die member in the respective directions of the reciprocatory movement of the slide for causing the die member and the plungers to move relatively and the punches to alternately enter and withdraw from said die openings.

' PAUL E. PEARSON. 

